Prevents panels attached to shelf from docking

ash/wm/panels/panel_window_resizer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_
 #define ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_
 
 #include "ash/wm/window_resizer.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 
 namespace gfx {
 class Rect;
 class Point;
 }
 
 namespace ash {
 
 // PanelWindowResizer is used by ToplevelWindowEventFilter to handle dragging,
 // moving or resizing panel window. These can be attached and detached from the
 // launcher.
 class ASH_EXPORT PanelWindowResizer : public WindowResizer {
  public:
   virtual ~PanelWindowResizer();
 
   // Creates a new PanelWindowResizer. The caller takes ownership of the
   // returned object. The ownership of |next_window_resizer| is taken by the
   // returned object. Returns NULL if not resizable.
   static PanelWindowResizer* Create(WindowResizer* next_window_resizer,
-                                    aura::Window* window,
-                                    const gfx::Point& location,
-                                    int window_component,
-                                    aura::client::WindowMoveSource source);
+                                    wm::WindowState* window_state);
 
   // WindowResizer:
   virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE;
   virtual void CompleteDrag() OVERRIDE;
   virtual void RevertDrag() OVERRIDE;
-  virtual aura::Window* GetTarget() OVERRIDE;
-  virtual const gfx::Point& GetInitialLocation() const OVERRIDE;
 
  private:
   // Creates PanelWindowResizer that adds the ability to attach / detach panel
   // windows as well as reparenting them to the panel layer while dragging to
   // |next_window_resizer|. This object takes ownership of
   // |next_window_resizer|.
   PanelWindowResizer(WindowResizer* next_window_resizer,
-                     const Details& details);
+                     wm::WindowState* window_state);
 
   // Checks if the provided window bounds should attach to the launcher. If true
   // the offset gives the necessary adjustment to snap to the launcher.
   bool AttachToLauncher(const gfx::Rect& bounds, gfx::Point* offset);
 
   // Tracks the panel's initial position and attachment at the start of a drag
   // and informs the PanelLayoutManager that a drag has started if necessary.
   void StartedDragging();
 
   // Informs the PanelLayoutManager that the drag is complete if it was informed
   // of the drag start.
   void FinishDragging();
 
   // Updates the dragged panel's index in the launcher.
   void UpdateLauncherPosition();
 
-  const Details details_;
-
   // Last pointer location in screen coordinates.
   gfx::Point last_location_;
 
   // Wraps a window resizer and adds panel detaching / reattaching and snapping
   // to launcher behavior during drags.
   scoped_ptr<WindowResizer> next_window_resizer_;
 
   // Panel container window.
   aura::Window* panel_container_;
   aura::Window* initial_panel_container_;
 
   // Set to true once Drag() is invoked and the bounds of the window change.
   bool did_move_or_resize_;
 
   // True if the window started attached to the launcher.
   const bool was_attached_;
 
-  // True if the window should attach to the launcher after releasing.
-  bool should_attach_;
-
   base::WeakPtrFactory<PanelWindowResizer> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelWindowResizer);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_PANELS_PANEL_WINDOW_RESIZER_H_